西宁地区地质雷达探测地下管线试验研究  

Experimental research of ground-penetrating radar in detecting underground pipelines in Xining region

作　　者：胡坪伸 张文[1,2] 张卫红 王新红 杨晓旭 王珑霖 HU Pingshen;ZHANG Wen;ZHANG Weihong;WANG Xinhong;YANG Xiaoxu;WANG Longlin(Qinghai University,Xining,810016,China;The Northern Qinghai-Tibet Plateau Cenozoic Laboratory of Resources and Environment,Xining 810016,China;Qinghai Electric Power Design Institute,Xining 810008,China;Xining Ningguang Engineering Consulting Co.,LTD,Xining 810008,China)

机构地区：[1]青海大学,青海西宁810016 [2].青藏高原北缘新生代资源环境重点试验室,青海西宁810016 [3]青海省电力设计院,青海西宁810008 [4].西宁宁光工程咨询有限公司,青海西宁810008

出　　处：《青海大学学报》2020年第2期87-95,共9页Journal of Qinghai University

基　　金：国家自然科学基金项目(51468055);青海省级重点实验室建设项目(k071714);青海省“135”人才工程项目;西宁宁光工程有限公司科技研发项目。

摘　　要：为了研究在西宁地区地质雷达探测地下管线的效果,文中开展了地质雷达探测不同类型和不同地下敷设深度管线的试验。通过敷设电缆、金属管、PVC管,调节设备参数设置,数据图像处理,对地质雷达探测结果进行参数、波幅、图像和介质干扰因素分析研究。结果表明:确定本次探测地层相对介电常数为7;地质雷达探测3种管线单列波最大波幅均大于正常值(7500 mV);对电缆和金属管探测效果较理想,而对PVC管的探测效果较差;受介质干扰因素的影响,400 MHz中心频率地质雷达仅可探明埋深1.5 m以内的管线敷设。研究结果解释了介质干扰的影响机理,提供了一种判断管线埋深和部位的依据。Experiments of ground-penetrating radar detecting pipelines of different types and laying depths are conducted for the propose of studying the effect of ground-penetrating radar in detecting underground pipelines in Xining region.Through laying cables,metal pipes and PVC pipes,adjusting equipment parameter setting and data image processing,the ground-penetrating radar detection results are analyzed and studied in terms of parameters,amplitude,image and medium interference factors.The results show that the relative permittivity of the surveyed strata is determined to be 7 and the maximum amplitude of single-train wave of the three pipelines detected by ground-penetrating radar is more than 7500 mV.The detection effect is good for cables and metal pipes but not for PVC pipes.Due to the influence of medium interference factors,the 400 MHz central frequency ground-penetrating radar can only detect the pipelines laying within 1.5 m of the buried depth.The research results explain the influence mechanism of medium interference and provide a basis for judging the buried depth and position of pipelines.

关 键 词：西宁地区 地质雷达 管线探测 波幅分析 图像解释 

分 类 号：P631.3[天文地球—地质矿产勘探]